Bachmann CNT204 Counter Module

Product Description

The Bachmann CNT204 is a counter module designed to process pulse signals from single-line pulse generators and incremental encoders. It provides four counter inputs, with two channels available for incremental encoder operation. The module supports 32-bit counting, configurable signal evaluation, encoder power supply, and high-resolution time measurements for monitoring pulse timing and phase differences.

Key Features

• Four counter inputs for single-line pulse generators.
• Two channels configurable for incremental encoder signals.
• 32-bit counter resolution.
• Incremental encoder evaluation with 1-fold, 2-fold, or 4-fold edge evaluation, or pulse direction mode.
• Adjustable input filters for signal conditioning.
• Green LED status indication for each counter or initiator input.
• Encoder power supply directly from the module via the terminal block.
• Synchronization of inputs.
• Monitoring of all supply voltages.
• Period and differential measurements with 42 ns resolution.
• Reverse polarity protection for the external power supply.

Technical Specifications

Counter and Encoder Operation

The CNT204 handles pulse counting and incremental encoder signals through configurable input channels. When incremental encoders are used, the module evaluates the A, B, and N signals according to the selected edge evaluation or pulse direction mode. This allows the application to process encoder pulse sequences and associated timing information.

The four counter inputs support single-line pulse generators with a maximum input frequency of 20 kHz. Using the two incremental encoder channels reduces the number of available counter inputs to two, so the required channel configuration should be checked before selection.

Measurement and Signal Monitoring

The module measures signal periods with a resolution of 42 ns. It can also measure the phase shift between counter inputs C1 and C3 or between C2 and C4 at the same resolution. These functions provide timing information for applications that require pulse interval or phase comparison.

Adjustable input filters allow the signal conditioning to be configured for the relevant input type. The module also monitors supply voltages and provides green LED status indication for each counter or initiator input.

Power Supply and Environmental Conditions

The CNT204 requires an external supply of 18 VDC to 34 VDC. Its encoder supply outputs provide +5 V and +24 V directly through the terminal block, subject to the specified voltage and current limits. The stated current consumption includes a base load of 40 mA at 24 VDC plus 1.2 times the encoder current consumption.

The module has a standard operating temperature range of -30 deg C to +60 deg C. The ColdClimate version has a different humidity condition, allowing operation at 5% to 95% relative humidity with condensation. Confirm the exact hardware variant before applying the relevant environmental specifications.

Frequently Asked Questions

Q: How many counter inputs are available on the CNT204?

A: The module provides four counter inputs for single-line pulse generators. When the two incremental encoder channels are used, the number of available counter inputs is reduced to two.

Q: What incremental encoder signals does the CNT204 support?

A: The listed signals are A-, A+, B-, B+, N-, and N+. The module supports 1-fold, 2-fold, or 4-fold edge evaluation and pulse direction mode. The maximum stated input frequency is 1 MHz for RS-422 or 300 kHz for HTL.

Q: What power supply does the CNT204 require?

A: The external supply range is 18 VDC to 34 VDC. The module can also supply encoders at +5 V and +24 V through its terminal block, within the specified current limits per encoder.

Other Attributes

• Country of Origin:  Austria
• Lead Time: In Stock, 2 Working Days

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